67183domain: NAppears in sequencesa(1)=1, a(n) = 6*a(n-1) + n.at n=6A014829Triangle related to generalized Euler numbers of type 2^n (A005799).at n=38A088990Triangle related to generalized Euler numbers of type 2^n (A005799).at n=43A088990Number of n-bit base-2 deletable primes.at n=22A096235